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Using the data given below, calculate the number of 0.5 m3
dumpers required to maintain a 0.5 m3 non-tilting mixer at maximum efficiency if concrete is to be placed 200 m away.
Data
Mixer output - 6 m3 per hour
Travelling average speed - 15 km per hour
Unloading time - 0.5 minute
Manouvering time - 0.2 minute
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